Brake



July 29, 1947 E. J. SADON BRAKE Filed Sept. 8, 1945 4 sheets-sneak 1 Jul29, 1947. I SADON 2,424,922

' BRAKE i I v Filed Sept. 8, 1945 4 Sheets-Sheet. 2

INVEN'I'OR -"r' owm asmiou 'r 'y i. KI ATTOR vs Jul 29, 1947. E. J.SADON 2,424,922

BRAKE Filed Sept; 3, 1945 4 Sheets-Sheet 3 INVENTOR EDWIN d. SADONPatented July 29, 1947 BRAKE Edwin J. Sadon, Cuyahoga Falls, Ohio,asslgnor to The Firestone Tire & Rubber Com Akron, Ohio, a' corporationof Ohio pany,

Application September 8, 1945 Serial No. 615,158

This invention relates to friction bra es of t e disc type and moreespecially it relates to brakes adapted for-use on automotive wheeledvehicles ings, and particularly pointedout in the appended claims.

Of the accompanying drawings:

Fig. 1 is a vertical sectional view of a vehicle and lever:

Fig. 6 is a part section the wedges;

' Fig. '7 is a fragmentary view of the brake drum, on a larger scale;

Fig. 8 is a view similar to Fig. 2 showing another embodiment ofthe'invention;

Fig. 9 is a section on the line 9-9 of Fig. 8;

Fig. 10 is a diametric section on the line lO-lfl of Fig. 11, showing anairplane wheel, and brake means constitutingyet another embodiment ofthe invention operatively associated therewith; and Fig. 11 is a sectionon the line lI-H of Fig. 10 showing the brake structure inelevation.

al edge view illustrating conventional manner. Thi drum may be of anydesired orrequired width and diameter and is formed with spaced aparttransversely slotted ingeneml; openings 6 to accommodate bolts "I whichare One of the chief objects of the invention is to welded to a discmember -8 that is mounted in provide a brake comprising a member or discroand rotates with the drum, suitable nutsle being tatable with a wheel,together with non-rotat provided for tightening and securing said discin able ring members on opposite sides thereof, and position. which aremoved into facial contact therewith The wheel spindle HI is ofconventional dcto effect the desired braking action. S gn and terminatesin a flat plate II that has Another object is to provide a friction typebosses I2 formed integral therewith, and in brake which is simple andcompact in construc-. which a king pin (not shown). is mounted. A tion,which is not likely to get out of order, which wedge ring H surroundsthe spindle plate I I and readily can be assembled, and which can beecois held in position by means of lugs l5 provided nomjcallymanufactured, 15 on the peripheral margin of said plate II, the

A further object is to provide simple, practiperiphery of said ring l4being toothed as shown cal and eflicient wedge mechanism for shifting atIt. A plurality of wedge shaped member I! the outer ring membersintoengagement with are welded or otherwise secured to ring H in therevolving disc member andprovide simple and spaced apart relation, saidwedges being adapted practical mean for anchoring the revolving disc toactivate brake rings I 8 and It in a manner member to the wheel drum.that presently will be explained.

With the foregoing and other objects in view, Brackets 20 are secured tothe opposite sides the present invention consists in the combination ofthe plate II in spaced apart relation and are and arrangement ofparts,hereinafter more fully formed with outwardly projecting forked bardescribed, illustrated in the accompanying drawsections 2|, discactuating levers 22 being pivotally connected to the ends of said barsections 2| at a point intermediate their length by means 01' pins 23and are angular in shape, as shown, the inner ends of the legs of thelevers engaging the wedge ring M, the outer ends of the legs engagingthe respective brake rings l8 and i9.

Lugs 24 are provided on the outer face of each of the brake rings inpairs, the outer legs of the brake levers being disposed therebetween tosupport said rings and prevent rotation thereof when engaged with therotating disc member 8. Asbestos facings or liners 25 and 26respectively are secured to the inner or confronting faces of said ringsby means of rivets (not shown).

0 when the mechanism is in position shown in tion of the wedge ring, andthe engagement of Referring first to Figs. 1 through 7 of the drawings,the numeral 5 designates a brake drum to which a wheel (not shown) issecured in the the inner end of wedges ll,

The wedge ring is rotated, of course, when a vehicle brake pedal (notshown) is actuated, and to this end there is provided a spur gear 21that meshes with the toothed edge I6 of thering [4, said gear having anaxial shaft section (not shown) extending from one side thereof andjournaled in a bearing 29 provided on the spindle.

the brake levers with the On the opposite side of the gear 211s anintegral shaft section 30, and a shaft 3! is connected thereto by meansof a conventional universal joint 32. A hanger 33 is mounted, on the endof shaft 3|, and a brake rod (not shown) 'is pivotally secured thereto;It will .be apparent that when the brake lever is actuated, the wedgering will be rotated accordingly to bring the ends of the wedges ll intoengagement with the inner end of the levers 22. Continued rotationforces the outer ends of the levers inwardly with the result thatthebrake rings l8 and I9 are moved into operative engagement with thedisc member 8.

From the foregoing description it will be apparent that the inventionrovides a simple, prac-- tical, and economical brake for use onautomotive vehicles in general, and achieves the other objects set outin the foregoing statement of objects.

Referring now to Figs. 8' and 9 of the drawing there is shown a brakestructure that is essentially similar to that previously described, and

mounted in pairs on opposite sides of spindle plate I la, each bracketcomprising a pair of arms 2Ia between which an angular lever member 36is ositioned, said lever being pivotally supported in the outer ends ofsaid arms. The lever members 36 are disposed radially of the device,their innermost end ortion extending laterally toward the wedge ringMa,- and adapted for engagement with respective wedges Ila, the latterbeing adapted to swing the levers on their pivots so that the outer endsthereof move toward the disc member 8a. Pivotally carried on the outerends of said levers 36 are respective metal discs or brake shoes 31, andsecured to each of the latter, on the face thereof that confronts thedisc member 8a is a facing 38 of friction material such as brake lining,

This embodiment of the invention functions in exactly the same manner asthat first described,

but since it has a smaller area of brake lining its.

' plane of the wheel, the-said wheel elements being retained inassembled relation by a plurality of bolt-likemembers 46. The wheelportions 44, 45are formed with end-flanges 41, 8 respectively thatretain a tire (not shown) upon the wheel. The flange 48, which is at theouter end of the wheel, has a suitable hub cap 49 mounted thereon. Theflange 41 at the opposite end of the wheel has an annular brake disc 50mounted thereon,. said disc being Z-shape in section, as shown, so as tostandin spaced relation to the end of the wheel, said disc being securedto the flange by screws Preferably the screwholes in the flange H arecountersunk, and the area about each screw-hole in the brake disc iscomplementally deformed or embossed so as to fit within saidcountersinks, the arrangement being such as to relieve the screws 5| ofmuch of the shearing strain arising as the result of torque set up inthe brake disc during braking operations.

Mounted upon the axle 40, in abutting relation to the bearing 4|thereon, is a bracket 53, said bracket formed with a radially extendingflange 54 that is disposed in the same plane as the operativfe portionof the brake disc 50. The bracket 53 is fixedly secured to'the axle 40'in any suitable manner, for example, by means of a set screw 65. Mountedin pairs, upon opposite lateral faces 'of the flange 54, at theperimeter thereof, are

brackets 56, '56, each of which comprises a pair of arms 51, 51 thatextend radially outwardly,

and at their free ends have an angular lever member "58 journaledtherein. A portion of each lever member 58 extends radially outwardly toa point disposed laterally of the brake disc 50, and pivotally carriedat the outer end of such portion is a metal disc or brake shoe 59 thathas a facing of friction material 60 on the side thereof that confrontssaid disc 59.

For urging the brake shoes 59 toward the brake drum, the opposite endportion of each .lever member 59 extends laterally toward an annularwedge ring 63 that is journaled upon the periphery of the flange 54,between the latter and the inner circumference of the brake disc 50.

, Portions of each bracket 56 extend beyond the latter are meshed with agear 61, the flange 54 being cut away at 68, Fig. 11, to admit saidgear.

The gear 61 is mounted upon one end of a rockshaft 69 that is journaledin a suitable bearing Ill formed on the bracket 53; The other end ofrock-shaft 69 has an operating lever ll mounted thereon and adapted forconnection with the usual brake rod (not shown). It will be apparcutthat oscillation of rock-shaft 69 will produce a braking action similartothat achieved in the previously described embodiments ofthe.invention. The braking mechanism may be protected by a metalcover-secured to the brake disc 56, said cover being shown in brokenlines in Fig. 10, and designated I3.

Other modification may be resorted to.without departing from the spiritof the invention,

or the scope thereof as defined by the appended claims,

What is claimed is: 1. The combination with a wheel spindle, o

a toothed ring member having wedges thereon in levers to force thefriction discs into frictional ring to bring the wedges into engagementwith th inner ends of said levers to shift the friction discs intofrictional contact with the disc memher.

3. The combination with a wheel spindle, of a ring gear having wedgeformations thereon in circumierentially spaced apart relation, arotatable brake drum having a disc-like brake-engaging portion rotatabletherewith, friction discs on op- 20 2,115,083

' outer ends pivotally connected to said friction posite sidesof thelatter, forked brackets supported by the spindle, angular shaped leverspivotaliy mounted on respective brackets with their discs so as tosupport the latter, and means for rotating said ring gear to move thewedges into operative engagement with the inner ends of said levers toforce the friction discs into frictional engagement with the disc-likeportion of the brake drum.

EDWIN Ir. SADON. REFEREfioEs CITED The following references are ofrecord in the file of this patent:

UNITED STATES PATENTS Name Date Pecker July 30, 1935 Pierce Apr. 26,1938 Number

